http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102659454-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_53b4d53983adbf56dd0e7d0bf96f8ce5 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C05B11-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C05B7-00 |
| filingDate | 2012-04-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2014-01-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e8bcad6a1073746af3082973020f868f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_edf7cf67c649222a74cbf3eb84542b61 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_69570c3df2d353e57b126c495314ae86 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0f160cd8ffa88c827648fb83558fd266 |
| publicationDate | 2014-01-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102659454-B |
| titleOfInvention | Method for preparing diammonium phosphate and slow release fertilizer by using high-impurity phosphorite |
| abstract | The invention discloses a method for preparing diammonium phosphate and a slow release fertilizer by using high-impurity phosphorite, which is characterized in that the method comprises the following steps: extracting the high-impurity phosphorite by adopting a wet-method phosphate process, directly neutralizing extracted high-impurity phosphate with a basic compound and controlling the neutralization degree of a system to be 0.05-0.7, the temperature to be 60-130 DEG C and the reaction time to be 10-120 minutes; filtering after reaction, producing filter residues into a raw material or a wrapping material of the slow release fertilizer or a blending fertilizer or other slow release fertilizers, concentrating a filtrate and controlling the P2O5 concentration of concentrated solution to be 36-45 percent; and continuously neutralizing the concentrated solution with a basic compound, controlling the neutralization degree of the solution to be 1.3-1.6 and producing neutralized slurry into the diammonium phosphate by adopting a traditional method. The method has the beneficial effects that the prophase flotation process of the high-impurity phosphorite is saved, and the utilization rate of phosphorus resources is improved; the applicability to the phosphorite is strong, and a diammonium phosphate product with excellent quality can be produced as long as the neutralization is properly adjusted. |
| priorityDate | 2012-04-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 45.